If you don’t live out west, then you probably haven’t heard of this one yet, but you probably will.
http://espn.go.com/outdoors/conservation/s/c_fea_NZ_snails_Becher.html
As an invasive species biologist, sometimes I feel like I am at the gates of Gondor with the orcs and Oliphants coming in through the cracks and breaking down the doors.
Ask you congressman to support the Non-indigenous aquatic invasive species act (NAISA). It will make your efforts to avoid the spread of these animals easier. The act will help slow the introduction of new species and help to combat those that are already here.
These buggers are not good, says Steve in a massive understatement. 
